If you have problems with the product you received, please contact us at the first time, we will provide the most satisfactory solution.Features:1. Thickness measurement of non-magnetic surface, coatings on magnetic metal substrates2. Single measurement, continuous measurement and differential measurement available3. Z-ero-point calibration, 2-point calibration and basic calibration available4. Metric and imperial units of measurement optional5. LCD backlight for easy reading6. Automatic shutdown7. Used in manufacturing metal processing chemical commodity inspection and other testing fieldsSpecification:Condition: 100% Model: GM210Measurement ranges0-1800um/0-70.9milResolution0.1um/1um/0.1milMeasurement error±(3%H+1um)Min. diameter of substrateDia. 12mmMin. thickness of substrate0.5mmMin. curvature radius of convex substrate2mmMin. curvature radius of concave substrate11mmPower supply2 * 1.5V AAA Batteries(not included)Operating temperature range0-40℃Operating humidity range10-95%RHLCD Size: 4.5 * 2.2cmWeight: Approx. 551g / 19.4ozSize: Approx. 11 * 6.1 * 2.6cm / 4.3 * 2.4 * 1.0inPackage List:1 * Coating Thickness Gauge7 * Calibration Plates1 * Box